Improve speed-test script
Improve speed-test script

Added --add-prefix and --remove-prefix which does just what it sounds
like.

bbaja42/NIPAP,bbaja42/NIPAP,garberg/NIPAP,SpriteLink/NIPAP,SoundGoof/NIPAP,plajjan/NIPAP,ettrig/NIPAP,fredsod/NIPAP,bbaja42/NIPAP,plajjan/NIPAP,ettrig/NIPAP,ettrig/NIPAP,garberg/NIPAP,SpriteLink/NIPAP,SoundGoof/NIPAP,garberg/NIPAP,ettrig/NIPAP,fredsod/NIPAP,garberg/NIPAP,plajjan/NIPAP,SpriteLink/NIPAP,fredsod/NIPAP,SpriteLink/NIPAP,SpriteLink/NIPAP,SoundGoof/NIPAP,fredsod/NIPAP,SoundGoof/NIPAP,plajjan/NIPAP,garberg/NIPAP,garberg/NIPAP,ettrig/NIPAP,plajjan/NIPAP,ettrig/NIPAP,SpriteLink/NIPAP,SoundGoof/NIPAP,bbaja42/NIPAP,bbaja42/NIPAP,fredsod/NIPAP,bbaja42/NIPAP,fredsod/NIPAP,plajjan/NIPAP,SoundGoof/NIPAP